铝电解废槽衬处理技术现状

doi:10.11962/1006-4990.2019-0379

Abstract

Abstract:

Spent pot lining（SPL） is a hazardous waste produced in the process of aluminum electrolysis,which threaten the ecological environment badly.How to realize the harmless disposal and resource utilization of SPL economically,safely and environmentally has become a hot topic in aluminum industry.The main source,composition and impact on the environment of SPL was reviewed.The treatment Methods of SPL were summarized.The industrial treatment technologies were mainly intro-duced and their future development trend were also analyzed.It provided reference for the treatment of SPL in China.

Key words: spent pot lining of aluminum electrolysis, hydrometallurgy, pyrometallurgy

CLC Number:

TQ133.1

Li Shuai,Liu Wanchao,Yang Gang,Kang Zeshuang,Liu Zhongkai. Present situation of treatment technology of spent pot lining of aluminum electrolysis[J]. Inorganic Chemicals Industry, 2020, 52(5): 6-10.

Figures/Tables 7

References 24

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项目	w （氟化物）	w （钠）	w （总铝）	w （碳）	w（氧化铝）		w（氰化物）		w （硅）
	7.5~22	8.6~22	7~22	13~69	9.2~26		0.04~0.6		0.7~10.9
主要赋存状态	Na₃AlF₆、NaF、CaF₂	Na₃AlF₆、NaF	Al、Al₂O₃、NaAl₁₁O₁₇	石墨	Al₂O₃、NaAl₁₁O₁₇		NaCN、 NaFe（CN）₆、Na₃FeCN₆		SiO₂
项目	w （铁）	w （钙）	w（硫酸盐）	w （锂）		w （镁）		w （磷）
	0.3~2.8	0.5~6.4	0.1~0.6	0.46~0.57		0.01~0.17		0.000 5~ 0.003
主要赋存状态	Fe₂O₃	CaF₂	—	LiF、Li₃AlF₆		MgF₂		—

公司	堆存方式	具体位置
埃及铝业（Egypt Alum.）	无衬垫填埋场	埃及纳格哈马地
力拓加铝（Rio Tinto Alcan）	无衬垫填埋场	加拿大卑诗省基蒂马特
俄铝（UC Rusal）	含衬垫填埋场	俄罗斯萨彦诺戈尔斯克
巴林铝业（Aluminium Bahrain）	含衬垫填埋场	巴林
海德鲁铝业（Hydro Aluminum）	工业固废堆场	挪威郎岛
俄铝（UC Rusal）	工业固废堆场	俄罗斯哈卡斯泰舍特
迪拜铝业（Dubai Aluminium Co.）	危废堆场	阿联酋迪拜
印度国家铝业（NALCO）	危废堆场	印度安古尔
力拓加铝（Rio Tinto Alcan）	建筑厂房内	加拿大魁北克省圣约翰湖区

National Inorganic Salts Information Center

Inorganic Acid-Base-Salt Committee of CIESC

Present situation of treatment technology of spent pot lining of aluminum electrolysis

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